Ken
>The system identifier is a URL,...
>
>4.3.1 XML Catalog Specification
You might want an extra paragraph between these two (or just before them)
that reads.
"The public identifier could be a formal public identifier that conforms to
the rules of ISO/IEC 9070:1987."
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Martin Bryan, The SGML Centre, Churchdown, Glos. GL3 2PU, UK
Phone/Fax: +44 1452 714029 WWW home page: http://www.u-net.com/~sgml/